Assuming that all stations are occupied and all lines are observed in both directions, compute the strength of figure factor for a completed quadrilateral.
- 0.40
- 0.50
- 0.60
- 0.70
\[
c = (n’ – S’ + 1) + (n – 2s + 3)
\]
\[
c = (6 – 4 + 1) + [6 – 2(4) + 3]
\]
\[
c = (3 – 3 + 1) + (3 – 8 + 3)
\]
\[
c = 4
\]
\[
F = \frac{D – c}{D}
\]
\[
F = \frac{10 – 4}{10}
\]
\[
F = 0.60 \leftarrow \text{answer}
\]
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